So I'm using the arduino (diecimila) for a light I am making, and like most lights, it will go long periods of being off or on with no user input and the same output from the arduino. (The code is essentially the same as the blinking LED bike light from the LadyAda tutorials - a group of LED's with a few different light modes controlled by a single button)
My question - how does the arduino hold up over long periods of time? If the light sits in an "off" state for a week (with the arduino waiting... ardently... for button input) will the chip start to overheat? Will it go to sleep? Will it go insane? What if it is "on"? (In which case the arduino will be using all six PWM pins to hold six corresponding transistors at saturation voltage)
The chip isn't going to be in an especially tight enclosed space - something the size of a shoebox.
Any sort of advice/experience would be appreciated.